Improvement in wagon-hubs



,UNIITED STATES PATENT OFFICE.

JOHN'D. HAM, VOF' BETHANY, GEORGIA, ASSIGN OR TO HIMSELF, ELI

MCGROAN,AND W. A. WILKINS, 0F SAME PLACE. l

IMPROVEMENT IN WAGON-HUBS.

Specification forming part of Letters Patent N0. 105,674, dated J uly26, 1870.

To all whom it may concern.'

Be it known that I, JOHN D. HAM, of Bethany, in the county of Jeii'erson and State of Georgia-,have invented a new and Improved Similar letters of reference indicate corre-- sponding parts.

This invention relates to a new wagon-hub, which is so constructed that it can be set to always hold the riln concentric to the axle, and' so that the spokes can be removed and replaced without disturbing thevrim.

The invention consists, iirst, in making the hub of two pieces, so that it can be bodily taken apart, not only to admit a double conical box, but also to allow therlaying open of the inner ends of the spokes for facilitating their vremoval and insertion without disturbing the rlm.

The invention also consists in making the box slightly eccentric, and in part polygonal, so that it can be set and locked in any position, to allow the wheel to be hung exactly concentric upon the axle.

A in the drawing represents the box, which is put into the hub. This box is, on its outside,

:of double conical form, being larger in the middle than it is at its ends. The larger middle portion of the box is polygonal, while the v ends are round. The bore of the box is slightly eccentric to its rounded outer side, as indicated in Figs. l and 2.

The hub is divided transversely and made in two parts, B and C, each having a tapering bore to receive one end ofthe box. The larger part, B,has the sockets for the spokes open on one side, to be closed by a ilange, a, of the other part, C.

Bolts b b serve to. lock the two parts B Cl together. When the same are taken apart the spokes can be taken out of their sockets to be repaired and readily replaced.

The box must be fitted with one end into one part,`B, before the other part, C, can be put on.

.The slight eccentricity of fthe box permits the wheel to be set on the axle in4 such manner that the rim is completely concentric. For this purpose the box Ais turned in the part B of the huband locked by its `polygon al portion lin the desired position.

By being of double-conical form the box cannot be longitudinally displaced, while its polygonal portion prevents it from turning spontaneously in the hub. l

The parts of the hub are made of malleable cast-iron orv other suitable material.

Having thus described myinvention, I claim las new 4and desire to secure by Letters Patent- The double conical hub-box A, having its exterior surface polygonal in the middle, rounded outwardly toward each end, and eccentric to the axis of rotation, as and for the purpose specified.

JOHN D. HAM. Witnesses JAMES KENEDY, JOHN M. KENEDY, A. J. J OINER. 

